Half to chas



7 (No Model.)

D. WQPORTER.

AUTOMATIC FAN.

Patented Aug. 10, 1886.

N PETERS. PhOIO- WKW Washing, D. Q

UNITED STATES:

PATENT Fries.

DAVID W. PORTER, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TOCHAS. PRILL, OF SAME PLACE.

AUTOMATIQ FAN.

SPECIFICATION forming part of Letters Patent No. 347.255, dated August10, 1886.

(No model.)

foaZlwhom it may concern..-

Be it known that 1, DAVID W. PORTER, of Pi ttsburg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvementsin Motors for Fans; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being bad to the accompanying drawings, whichform part of this specification.

My invention relates to an improvement in motors for fans; and itconsists in the combination of an air-pump or other suitable compressor,a tank into which the air is pressed,

a cylinder, a piston and piston-rod placed l motor for a fan, which,together with the fan,

can be moved freely around from one place to another, the fan adjustedinto any desired position, and then set in motion.

Figure 1 is a side elevation, partly in section, of a motor embodying myinvention. Fig. 2 is a vertical cross-section taken at right angles toFig. 1. Fig. 3 is a horizontal sec tion taken through the top of thebase. Fig. 4 is an edge view of the spring and its attachments.

A represents a suitable frame-work of any kind, and which is mountedupon rollers B, so as to be moved, readily from one place to another.Mounted upon the top of this framework B are the two pillars or uprightsO, of any length, and which have the shaft D extending across anduniting them together at their upper ends. Upon this shaft D are placedthe two arms F, in which the fan F is journaled at their outer ends. 7,The fan F is adjusted vertically by means of the slotted arm G, which isheld in any desired position by means of a set-screw or other similardevice, which will hold the arm in any position in which. it may beadjusted.

In the base A is placed an air-pump, H, which is operated by the leverI, which projects through the top of the frame. The air passes from thepump I through the pipe J into the reservoir L, where it can becompressed to any desired degree. Leading from this reservoir L to thebottom of the cylinder N is a pipe,'0, which is provided with astopcock,P. TIn this cylinder N is placed a tightly-fitting piston, Q, to whichthe rod R is connected, and which rod extends up through the top of thepillar or post 0. To the bottom of the cylinder is' connected astop-cock, S by means of which the air in the cylinder below the pistoncan be discharged after the stopcock in the pipe 0 has been closed, soas to shut-off communication between the cylinder N and the reservoir L.When the stop-cock S is closed and the one, P, is open the compressedair passes into the bottom of the cylinder N and forces the piston Qandrod R upward. Fastened to this rod R, above the top of the cylinder, isa suitable projection,*T, of any kind, and to this projection T isfastened a cord, U, which extends down and passes around aIdrum orpulley, V, inside of which is placed a spring and ratchet. This ratchetand dog'W engage, so as to hold the spring at any desired point. As thepiston Q and rod R move upward, the cord U causes the drum V to revolve,and in revolving the spring is wound up. After the piston has been movedas high as it will move in the cylinder the cock P is closed and theone, S, is opened, so as to dischargethe air from the cylinder, and thenthis-spring draws the piston down to the bottom of the cylinder again,where it is again ready to be operated upon by the compressed air.

Journaled horizontally in the base A are the two shafts X, upon whichare arranged, alternatel y, a series of large and small driving-pulleys,the small pulleys being placed opposite and geared to the large ones forthe purpose of multiplying speed. Bands, belts, wires, or cords are usedto connect these pulleys together and impart the motion which isconnected to the first large pulley, next to the spring-actuated drum,successively to the others, which are placed loosely on their shafts.The firstlarge pulley moves veryslowly,but the last one of the smallpulleys, from which the belt Y passes, moves very rapidly. The belt Ypasses up through one of the hollow standards and around a pulley whichis placed upon the driving-shaft 1). Upon this shaft l) is placed apulley, Z, from which passes the driving-belt 1 around the pulley 2 onthe fanshaft. \Vhen the stop-cock I is opened, so as to admit air to thebottom of the cylinder N, the whole train of pulleys is at once set inmotion, and the fan is driven very rapidly, so as to create a current ofair. When the stopcock P is closed, the fan at once stops. The pulleys,being placed loosely upon the shaft X, are not cll'eelied by the reversemovement of the drum V.

Having thus described my invention, I claim The combinationofanair-compressor, a reservoir for the compressed air, a pipe forconneeting the reservoir and cylinder, the piston placed in thecylinder, a projection on the piston-rod, a spring-drum placed upon oneof the shafts and connected to the projection on the pis on-rod, the twoshafts upon which the drivi ng-p ulleys are placed, the driving-pulleysconnected together, the standards, the drivingshaft journaled in thestandards, the arms projecting from the standards and between which thefan is journaled, the fan, and the operating-belt for driving the fan,substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

DAVI D XV. TOFFEE. \Yilncsses:

.TnNNIn Kama, EMMA A. MoGINNIs.

